CVE-2024-58084

In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool() Commit 2e4955167ec5 ("firmware: qcom: scm: Fix __scm and waitq completion variable initialization") introduced a write barrier in probe function to store global '__scm' variable. We all known barriers are paired (see memory-barriers.txt: "Note that write barriers should normally be paired with read or address-dependency barriers"), therefore accessing it from concurrent contexts requires read barrier. Previous commit added such barrier in qcom_scm_is_available(), so let's use that directly. Lack of this read barrier can result in fetching stale '__scm' variable value, NULL, and dereferencing it. Note that barrier in qcom_scm_is_available() satisfies here the control dependency.

• CWE-476
• CWE-476

• https://git.kernel.org/stable/c/b628510397b5cafa1f5d3e848a28affd1c635302Patch
• https://git.kernel.org/stable/c/e03db7c1255ebabba5e1a447754faeb138de15a2Patch
• https://git.kernel.org/stable/c/fee921e3c641f64185abee83f9a6e65f0b380682Patch

Published

Mar 6, 2025

Last Modified

Jun 17, 2026

Status

Modified

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